package com.iflytek.iot.web.utils;

import com.iflytek.iot.common.utils.ServerUtils;

import javax.servlet.http.HttpServletRequest;




/**
 * web项目环境的ip地址获取工具
 *
 * @author yu 2018/12/28.
 */
public class WebIpUtils {


    /**
     * 获取用户真实IP
     */
    public static String getUserIp(HttpServletRequest request) {
        String ip = request.getHeader("x-forwarded-for");
        if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
            ip = request.getHeader("X-Real-IP");
        }
        if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
            ip = request.getHeader("Proxy-Client-IP");
        }
        if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
            ip = request.getHeader("WL-Proxy-Client-IP");
        }
        if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
            ip = request.getRemoteAddr();
            if (ip.equals("127.0.0.1")) {
                ip = ServerUtils.getServerIp();
            }
        }

        //cast localhost
        if ("0:0:0:0:0:0:0:1".equals(ip)) {
            ip = ServerUtils.getServerIp();
        }

        // 对于通过多个代理的情况，第一个IP为客户端真实IP,多个IP按照','分割
        if (ip != null && ip.length() > 15) {
            if (ip.indexOf(",") > 0) {
                ip = ip.substring(0, ip.indexOf(","));
            }
        }

        return ip;
    }
}
